diy artificial bouquets?

Hiya, has anyone DIYed their bridal bouquets? This is something I’m super comfortable doing and my mum is great at floral arrangements so that’s no problem but I’m struggling to work out where to get high quality artificial flowers? Really don’t want to end up with the overly cheap artificial looking ones, I’d like them to really look beautiful like the kind where you don’t even notice their faux straight off. Anyone had any experience good or bad getting faux flowers?